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Method, device and system for sending random access preamble sequence

A technology of random access preamble and transmission method, which is applied in the field of communication and can solve problems such as mutual interference of terminal devices and blurred detection of base stations.

Active Publication Date: 2019-09-20
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the LTE system communicates on a higher operating frequency or the mobile speed of the terminal equipment is very high, the PRACH subcarrier spacing of the Doppler frequency shift greater than 1 times is less than the PRACH subcarrier spacing of 2 times. There are mutual interference between terminal equipment and fuzzy problems of base station detection

Method used

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  • Method, device and system for sending random access preamble sequence
  • Method, device and system for sending random access preamble sequence
  • Method, device and system for sending random access preamble sequence

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Embodiment Construction

[0403] The network architecture and business scenarios described in the embodiments of the present invention are to more clearly illustrate the technical solutions of the embodiments of the present invention, and do not constitute limitations on the technical solutions provided by the embodiments of the present invention. The evolution of the architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present invention are also applicable to similar technical problems.

[0404] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex ( time division duplex, TDD) communication system, etc.

[0405] It should also be understood that in this embodiment of the present inventio...

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Abstract

The invention relates to the field of mobile communication, in particular to a random access technology in a wireless communication system. The invention provides a method, a device and a system for sending a random access preamble sequence. In the scheme, the terminal device obtains the cyclic shift value meeting the high-speed moving scene and sends the random access preamble sequence corresponding to the cyclic shift value. Due to the fact that the influence caused by the high-speed moving scene is considered when the random access preamble sequence is determined, interference between terminal devices is avoided in the high-speed scene.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method, device and system for sending a random access preamble. Background technique [0002] When the terminal equipment communicates with the base station in the case of high-speed movement, there is a frequency difference between the frequency transmitted by the terminal equipment and the frequency received by the base station, which is called the Doppler frequency shift f D , and f D =fv / c, where f is the carrier frequency, v is the moving speed, and c is the speed of light. The Doppler frequency shift will cause mutual interference between terminal devices during random access, and will also cause fuzzy detection when the base station detects the random access preamble sent by the terminal device. [0003] In the existing Long Term Evolution (LTE, Long Term Evolution) system, a special design is made for the PRACH subcarrier spacing with a Doppler frequency shift le...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W74/00H04W74/08H04W72/04
CPCH04W74/004H04W74/0833H04W74/0866H04W72/23
Inventor 赵越郭志恒吴强程型清
Owner HUAWEI TECH CO LTD